The mystery of efficiency between 3 under and split.

[hera]

   


   

[hera]

 


 

[hera]

 

You can say : who care.

My doubt is,is there a little bit different ?

[Gene Roberts]

So.....What's the point,Which one is more efficient?I personally shoot three under.

[robslifts]

when you shoot three under the middle finger pulls directly at center of most bows and thus being more efficient  jmho

[Matty]

I like this post I think the right minds can create big waves here.  One thing to think about though, is that MANY people don't hold the bow at the lowest portion of the riser or should I say put the majority of Force on that portion. I see lots of people put the HEEL of the hand on the Lowest part of the handle which changes everything.  Then when you look at their Nockpoint it's 1" above top dead

[Benny Nganabbarru]

Both kill. Both can blow an arrow clean through a big animal, and into the never-never beyond.

[ChuckC]

Let's throw some added tidbits in there.  There is no actual distance above center that the platform or shelf of the riser is cut to.  One bowyer may chose 1" above center, others 1.5", still others right at center line.  That brings even more changes to the puzzle.

ChuckC (from India today)

[NDTerminator]

it's 0430 in the morning, this makes my head hurt...  

[hera]

Sorry Jon.
     

[Benny Nganabbarru]

How does having a bow tillered for three-under affect this?

My bows tillered for split-finger are just as deadly when shot three-under... but the new Schafer that will arrive soon has been tillered for three-under.

[hera]

IMO,just IMO.
there are not so big different in hunting situation.
But for a new bowyer like me,I just like to know the detail,I should not be too lax in this knowledge.

[Orion]

Hera:  How did you measure/arrive at the center of the bow?  Did you assume the center of the throat was the center of the bow or find that through actual measurement?  If the center of the bow pictured is, in fact, the center of the throat, then the arrow shelf is only about 3/4 inch above center.  

Most bowyers put the shelf 1 1/4 to 2 inches above the center of the bow.  Or, stated another way, the deepest part of the throat on the riser is often not the center of the bow; it's above the center of the bow.  If that's the case here, that would throw your numbers off.  For what it's worth.

[Kingstaken]

In Hera's other build along, it lQQked like Hera had the bow's center balanced on the deepest part of the throat.http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=056510;p=10

I like the thought processes. Shows the mind of a true craftsmen. Not afraid to think outside the box.
Everyone knew from the beginning of time anything held above the ground would fall but it took Newton millions of years later to discover a great obvious theory. Imagine your friend said "Listen Jim, did you know that anything at rest stays at rest ....." you'd call the guys in the white suits on him or say you've drank too much again bubba.
It wasn't until it was written down on paper, that the blood began to flow thru his brain bouncing off new ideas which lead to big advances in technology.

[hera]

I should not start this thread.
  :(    :p  
 I dig into my dictionary when I read all reply.........          

[Bard1]

oooh poor Hera. Now his head hurts.    

How's the new bow shoot Hera?

[Jeff Strubberg]

You are making an assumption.

Why would pulling on the center of the bow be more efficient?

[hera]

quote:Originally posted by Bard1:
oooh poor Hera. Now his head hurts.        Bard1

BTW,shoot really well,good balance and wide spine tolerance.

[ChuckC]

Hera... nothing wrong with this thread.  Making us think a little is all.  

pass the aspirin please.
ChuckC

[R H Clark]

IMHO you will get max efficiency when both limbs are pulled and released with equal force.The question becomes how to achieve this.People grip the bow and even hold a string differently.That is why nocking point has to be adjusted for each person.Also why different tiller requires different nocking points.It's all part of tuning and is why a well tuned arrow will shoot faster than a poorly tuned arrow of the same weight.